---
title: "den titel des mount points in navigation ausgeben..."
url: "https://www.typo3.net/d/113498-den-titel-des-mount-points-in-navigation-ausgeben"
source: "typo3.net"
tags: ["TYPO3","Menüs","Frage","Seiten & Seitenbaum"]
created: "2013-01-17"
last_reply: "2013-01-30"
replies: 1
solved: false
page: 1
pages: 1
lang: "de"
---

# den titel des mount points in navigation ausgeben...

TYPO3 › Menüs · 1 Antwort · gestartet 2013-01-17

## Eröffnungsbeitrag

**rookie07** · 2013-01-17 · [Beitrag #1](https://www.typo3.net/d/113498-den-titel-des-mount-points-in-navigation-ausgeben/1)

hallo zusammen,

in unserer navigation sollen die titel des mount points (show content from mounted page) in die navigation ausgegeben werden. leider nimmt typo3 bei so eine konfig auch gleich immer den seitentitel der referenzierten seite. kann typo3 so konfiguriert werden, dass es zuerst den mount point titel nimmt (falls vorhanden), falls nicht vorhanden (fallback standard-verhalten) den titel der aktuell referenzierten seite verwendet.

ich hab's schon mit typoscript probiert wieder verworfen und den code in eine UserFunc gesteckt. es scheint aber ein grundsätzliches problem zu sein, aus der datenbank kann ich nur auf folgende abhängigkeiten schließen:

```php
$res = $GLOBALS['TYPO3_DB']->exec_SELECTquery("title, (select title from pages as p where mount_pid=pages.uid and title <> '') as mountpagetitle",
													  'pages',
													  'uid='.$GLOBALS['TSFE']->id.$cObj->enableFields('pages'));
```

das problem ist, es können mehrere mount points dieselbe page einbinden - somit ist es daher relativ schwierig anhand der aktuellen seite (pages.uid) auf den zu verwendenden moint point zu schließen. ich bräuchte also irgenwie einen mechanismus wie referer um zu wissen welche moint point gerade meine seite referenziert...

hat irgendjemand einen tipp für mich?
steh etwas am schlauch, merci!

## Antworten

### [#2](https://www.typo3.net/d/113498-den-titel-des-mount-points-in-navigation-ausgeben/2) · rookie07 · 2013-01-30

ich hab's mal so hingeschustert, dass die navigation sich nun nach unserm speziellen verhalten richten sollte - hab das ganze gleich in php gelöst weil mir das in typoscript zu schwierig war und ich auch in php noch nicht ganz fit bin.
schlüsselstellen sind:

```typoscript
config.linkVars = L, MP
```

somit sollten mountpoints, sprache und die realurl-anbindung entsprechend funktionieren, hier einige code-snippets:

```typoscript
//--------------------------------MAIN NAVI, SUB NAVI, SIDEBAR / SUBMENU------------------------------
# load the navigation php scripts
includeLibs.navigationHelper = typo3conf/ext/unisbghookconsumer/user_navigationhelper.php

#------------------------------------------------------------------------------------------------
# WATCH the sequence of creating the navigations, breadcrumb before subnavi and subnavi caption!
#------------------------------------------------------------------------------------------------

# breadcrumb navigation - COA_INT important not to be cached as it uses the FE session internally
lib.field_breadcrumbs = COA_INT
lib.field_breadcrumbs {
  10 = TEXT
  10 {
    postUserFunc = user_navigationhelper->getBreadcrumbs
    postUserFunc.TabIndex = 200
    postUserFunc.AccessKey = b
    postUserFunc.RootNodeUid = 3
  }
}

# sub navigation in the left column - COA_INT important not to be cached as it uses the FE session internally
lib.field_subnavi = COA_INT
lib.field_subnavi {
  10 = TEXT
  10 {
    postUserFunc = user_navigationhelper->getSubNavi
    postUserFunc.TabIndex = 30
    postUserFunc.AccessKey = u
  }
}

lib.field_subnavicaption = COA_INT
lib.field_subnavicaption {
  10 = TEXT
  10 {
    postUserFunc = user_navigationhelper->getMountPointTitle  
  }
}

# main navigation (horizontal)
lib.field_mainnavi = COA_INT
lib.field_mainnavi{
  10 = TEXT
  10 {
    postUserFunc = user_navigationhelper->getMainNavi
    postUserFunc.TabIndex = 20
    postUserFunc.AccessKey = m
    # pages.uid of the "zentrale navigation"
    postUserFunc.ZentraleNaviUid = 18394
    # max items to be shown in the navigation, disabled pages are ignored
    postUserFunc.maxItems = 4
  }
}

lib.field_mainverticalnavi = COA_INT
lib.field_mainverticalnavi {
  10 = TEXT
  10 {
    postUserFunc = user_navigationhelper->getMainHorizontalNavi
    postUserFunc {
      TabIndex = 102
      # pages.uid of the "zentrale navigation"
      ZentraleNaviUid = 18394
      # first page to start with, as all child-pages of the "zentrale navigation" could be shown, diabled pages are ignored
      # caution starindex may change if pages are hidden or excluded as the range (the LIMIT statement) changes
      firstItemIndex = 4
      # max items to be shown in the navigation, disabled pages are ignored  
      maxItems = 4
      # comma separated list of pages.uid to be ignored
      excludeItemIds = 20708, 20084, 20083
  }
}
```

```php
<?php
require_once(PATH_t3lib . 'class.t3lib_div.php');
require_once(PATH_t3lib . 'class.t3lib_page.php');

class user_navigationhelper {

	/**
	 * Gets the titel of the mount point if the current page was mounted in order to overwrite the pages title
	 *
	 * @param  	string		content parameter.    
	 * @param  	array    	Typoscript configuration array (containing assigned funtion parameters)
	 * @return  string    	Returns the title of the mount point in order to overwrite it or the title of the current page.
	 */
	public function getMountPointTitle($content, $conf){
        // get the session data created from breadcrumb
		$sessionData = array();
		$sessionData = $GLOBALS['TSFE']->fe_user->getKey('ses', 'tx_unisbghookconsumer_breadcrumb');
        // find the id and get the title
        foreach ($sessionData as $page) {
            if ($page['id'] == $uid = $GLOBALS['TSFE']->id){
                $content .= $page['title'];
            }
        }
		return $content;
	}
	
	
	/**
	 * Renders the main vertical navigation.
	 * @param string	$content	String submitted into this UserFunc in order to be manipulated and returned.
	 * @param array		$conf		Collection containing the functions parameter / config.
	 * @return string				A <li> wrapped <a>-tag list representing the navigation
	 */
	public function getMainHorizontalNavi($content, $conf) {
		// get TypoScript configured data
		$tabindex = intval($conf['TabIndex']);
		if (empty($tabindex)){
			$tabindex = 20;
		}
		$accesskey = $conf['AccessKey'];
		if (empty($accesskey)){
			$accesskey = 'm';
		}
		$zentraleNaviUid = $conf['ZentraleNaviUid'];
		if (empty($zentraleNaviUid)){
			$zentraleNaviUid = 0;
		}
		$firstItemIndex = $conf['firstItemIndex'];
		if (empty($firstItemIndex)){
			$firstItemIndex = 0;
		}		
		$maxItems = $conf['maxItems'];
		if (empty($maxItems)){
			$maxItems = 64;
		}
		$excludeItemIds = $conf['excludeItemIds'];
		if (!empty($excludeItemIds)){
			$excludeItemIds = 'and uid not in ('.$excludeItemIds.')';
		}
				
		// select a range out of all first level children of the parent node
		$res = $GLOBALS['TYPO3_DB']->exec_SELECTquery(  'uid,pid,title,target,(select p.title from pages_language_overlay p where p.pid=pages.uid) as translation',
														'pages',
														'pid='.$zentraleNaviUid.$GLOBALS['TSFE']->cObj->enableFields('pages').' '.$excludeItemIds,
														'',
														'sorting',
													 	$firstItemIndex.','.$maxItems);
		$counter = 0;
		while(($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)))	{
				
			$activePage = '';
			if ($row['uid'] == $GLOBALS['TSFE']->id){
				$activePage = 'class="active"';
			}
			
			$title = $row['title'];
			// not default language (de)
			if ($GLOBALS['TSFE']->sys_language_uid > 0){
				$title = $row['translation'];
			}
				
			$href = $GLOBALS['TSFE']->cObj->getTypoLink_URL($row['uid']);
			$content .= '<li '.$activePage.'><a '.$accKey.' title="'.$title.'" href="'.$href.'" tabindex="'.$tabindex.'">'.$title.'</a></li>';
			$tabindex++;
		}
		
		
		return $content;
	}
	
	/**
	 * Renders the main horizontal navigation.
	 * @param string	$content	String submitted into this UserFunc in order to be manipulated and returned.
	 * @param array		$conf		Collection containing the functions parameter / config.
	 * @return string				A <li> wrapped <a>-tag list representing the navigation
	 */
	public function getMainNavi($content, $conf){
		// get TypoScript configured data
		$tabindex = intval($conf['TabIndex']);
		if (empty($tabindex)){
			$tabindex = 20;
		}
		$accesskey = $conf['AccessKey'];
		if (empty($accesskey)){
			$accesskey = 'm';
		}
		$zentraleNaviUid = $conf['ZentraleNaviUid'];
		if (empty($zentraleNaviUid)){
			$zentraleNaviUid = 0;
		}
		$maxItems = $conf['maxItems'];
		if (empty($maxItems)){
			$maxItems = 64;
		}
		
		$res = $GLOBALS['TYPO3_DB']->exec_SELECTquery('uid,pid,title,target,(select p.title from pages_language_overlay p where p.pid=pages.uid) as translation',
													  'pages',
													  'pid='.$zentraleNaviUid.$GLOBALS['TSFE']->cObj->enableFields('pages'),
													  '',
													  'sorting',
													  $maxItems);
		$counter = 0;
		while(($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)))	{
			
			$accKey = '';
			if ($counter == 0){
				$accKey = 'accesskey="'.$accesskey.'" id="access-'.$accesskey.'"';
			}
			
			$activePage = '';
			if ($row['uid'] == $GLOBALS['TSFE']->id){
				$activePage = 'class="active"';
			}
			
			$title = $row['title'];
			// not default language (de)
			if ($GLOBALS['TSFE']->sys_language_uid > 0){
				$title = $row['translation'];
			}
			
			// delete the linkVars in order not to append &MP params onto the URL
			// error_log('mainnavi linkvar: '.$GLOBALS['TSFE']->linkVars.', sys lang:'.$GLOBALS['TSFE']->sys_language_uid."\n", 3, 'C:\xampp\apache\logs\error.log' );
			$GLOBALS['TSFE']->linkVars = $this->removeMPparams($GLOBALS['TSFE']->linkVars);
			$href = $GLOBALS['TSFE']->cObj->getTypoLink_URL($row['uid']);
			$content .= '<li '.$activePage.'><a '.$accKey.' title="'.$title.'" href="'.$href.'" tabindex="'.$tabindex.'">'.$title.'</a></li>';
			$counter++;
			$tabindex++;		
		}
		
		return $content;
	}
	
	/**
	 * Gets the main pages data to be worked with later on out of the database.
	 * @return array	multidimesional array containing the most important pages records data
	 */
	private function getPagesRecordData() {
		global $TSFE;
		$cObj = $TSFE->cObj;
		$pageSelect = t3lib_div::makeInstance('t3lib_pageSelect'); // object for later translation
		$prepareEnableFields = $cObj->enableFields('pages');
		$prepareEnableFields = str_replace('pages.', 'p1.', $prepareEnableFields); // prepare for self join statement
		$res = $GLOBALS['TYPO3_DB']->exec_SELECTquery('p1.uid, p1.pid, p1.title, p1.doktype, p1.mount_pid, p1.mount_pid_ol, p1.target, p1.url,
													   p2.uid as mpUid, p2.pid as mpPid, p2.title as mpTitle, p2.target as mpTarget',
													  'pages p1 left join pages as p2 on p1.mount_pid = p2.uid',
													  'p1.pid='.$TSFE->id.$prepareEnableFields);
		$recordData = array();
		while(($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)))	{
			$uid = $row['uid'];
			$pid = $row['pid'];
			$title = $row['title'];
			$doktype = $row['doktype'];
			$mount_pid = $row['mount_pid'];
			$mount_pid_ol = $row['mount_pid_ol'];
			$target = $row['target'];
			$url = $row['url'];
			
			// overlays for mountpoint
			$mpUid = $row['mpUid'];
			$mpPid = $row['mpPid'];
			$mpTitle = $row['mpTitle'];
			$mpTarget = $row['mpTarget'];
			
			$titleTranslated = '';
			$mountpointParams = null;
			// not default language (de)
			if ($GLOBALS['TSFE']->sys_language_uid > 0){
				// if the current page is a mount point and "use content of mounted pages" is active overwrite the title / fallback if empty
				// CAUTION! there should not be any other combination of mountpoints!
				if (!empty($mount_pid) && $doktype == 7 && $mount_pid_ol == 1){
					$mpTranslationrecord = $pageSelect->getPageOverlay($mpUid, $GLOBALS['TSFE']->sys_language_uid);
					// if no record found it might be hidden or nor existent so do not provide a hyperlink
					if (empty($mpTranslationrecord)){
						continue;
					}

					// if not empty get the title of the mountpoint
					$titleTranslated = $mpTranslationrecord['title'];
					
					// add mountpoint params eg. 1116-19942 if no shortcut
					if ($doktype != 4){
						$mountpointParams = array('MP'=>$mount_pid.'-'.$uid);
					}
				}
				
				// get translation of the current page / if it is not mountpoint
				$translationRecord = $pageSelect->getPageOverlay($uid, $GLOBALS['TSFE']->sys_language_uid);
				// if no record found it might be hidden or nor existent so do not provide a hyperlink
				if (empty($translationRecord) && empty($mpTranslationrecord)){
					continue;
				}
				
				// overwrite the title if supplied
				if (!empty($translationRecord['title'])){
					$titleTranslated = $translationRecord['title'];
				}
				
				$title = $titleTranslated;
				
				// add language info
				if (is_array($mountpointParams)){
					$mountpointParams['L'] = $GLOBALS['TSFE']->sys_language_uid;
				}
				else {
					$mountpointParams = array('L'=>$GLOBALS['TSFE']->sys_language_uid);
				}
			}
			else { // default language (de)
				// check if page is mountpoint and "use content of mounted pages" is active
				$substituteTitle = $mpTitle; // title of mounted page
				if (!empty($mount_pid) && $doktype == 7 && $mount_pid_ol == 1){
					if (!empty($title)){ // overwrite title
						$substituteTitle = $title;
					}
					$title = $substituteTitle;

					// add mountpoint params eg. 1116-19942 if no shortcut
					if ($doktype != 4){
						$mountpointParams = array('MP'=>$mount_pid.'-'.$uid);
					}
				}
			}
			
			// save data in array to be returned
			$recordData[] = array('uid'=>$uid, 'MP'=>$mountpointParams, 'title'=>$title, 'target'=>$target, 'doktype'=>$doktype, 'url'=>$url);
		}
		
		return $recordData;
	}
	
	/**
	 * TypoScript UserFunc to build the subnavigation in left column
	 *
	 * @param  	string		content parameter.    
	 * @param  	array    	Typoscript configuration array (containing assigned funtion parameters)
	 * @return  string    	Returns a list of <a>hyperlinks wrapped by <li>.
	 */
	public function getSubNavi($content, $conf){
		
		$tabindex = intval($conf['TabIndex']);
		if (empty($tabindex)){
			$tabindex = 30;
		}
		$accesskey = $conf['AccessKey'];
		if (empty($accesskey)){
			$accesskey = 'u';
		}		
		$counter = 0;
		
		$recordData = $this->getPagesRecordData();
		foreach ($recordData as $pages) {
			$linkType = '';
			// check if external link
			if ($pages['target'] == '_blank' && $pages['doktype'] == '3' && $pages['url'] != ''){
				$linkType = 'class="ext"';
				// check if document link
				$pos = strripos($pages['url'], '.');
				if ($pos != false){
					$extension = substr($pages['url'], $pos+1, strlen($pages['url'])-$pos);
					// if the realurl is installed every url might end with eg .html
					if (t3lib_extMgm::isLoaded('realurl'))
					{
						if ($extension != 'html'){
							$linkType = 'class="doc"';
						}
					}
					else { // if no realurl is installed this is just a VERY simple work-arround for specifying a link to ba a document link
						if ($extension != 'html' && $extension != 'php'){
							$linkType = 'class="doc"';
						}
					}
				}
			}
			
			$href = $GLOBALS['TSFE']->cObj->getTypoLink_URL($pages['uid'], $pages['MP'], $pages['target']);
			//error_log('uid: '.$pages['uid'].', MP: '.$pages['MP'].', href: '.$href."\n", 3, 'C:\xampp\apache\logs\error.log' );
			
			$target = '';
			if (!empty($pages['target'])){
				$target = 'target="'.$pages['target'].'"';
			}
			
			if ($counter == 0){
				$content .= '<li '.$linkType.'><a id="access-'.$accesskey.'" accesskey="'.$accesskey.'" href="'.$href.'" title="'.$pages['title'].'" tabindex="'.$tabindex.'"'.$target.'>'.$pages['title'].'</a></li>';
			}
			else {
				$content .= '<li '.$linkType.'><a href="'.$href.'" title="'.$pages['title'].'" tabindex="'.$tabindex.'"'.$target.'>'.$pages['title'].'</a></li>';
			}

			$counter++;
			$tabindex++;
		}
		
		return $content; 
	}

	/**
	 * 
	 * Checks if the current page is one of the root pages clicked in the main navigation
	 * @param array	 $rootline			Rootline of the current page
	 * @param int	 $rootNodeUid		pages.uid of the rootnode
	 */
	private function isMainNavigationRoot($rootline, $rootNodeUid){
		$isRoot = false;
		if (count($rootline) === 3){
			if ($rootline[0]['pid'] == 0 && $rootline[1]['pid'] == $rootNodeUid){
				$isRoot = true;
			}
		}
		return $isRoot;
	}

	/**
	 * TypoScript UserFunc to build the subnavigation in left column
	 *
	 * @param  	string		content parameter.    
	 * @param  	array    	Typoscript configuration array (containing assigned funtion parameters)
	 * @return  string    	Returns a list of <a>hyperlinks wrapped by <li>.
	 */
	public function getBreadcrumbs($content, $conf){
		// get TypoScript configured data
		$tabindex = intval($conf['TabIndex']);
		if (empty($tabindex)){
			$tabindex = 200;
		}
		$accesskey = $conf['AccessKey'];
		if (empty($accesskey)){
			$accesskey = 'b';
		}
		$rootNodeUid = $conf['RootNodeUid'];
		if (empty($rootNodeUid)){
			$rootNodeUid = 0;
		}
		
		// get session data
		$sessionData = array();
		$sessionData = $GLOBALS['TSFE']->fe_user->getKey('ses', 'tx_unisbghookconsumer_breadcrumb');
		
		// iterate through the rootline and reverse the order to geht: home->subleve01->sublevel02 aso...
		$rootline = $GLOBALS['TSFE']->rootLine;
		
		// reset the session variable while the main navigation root has changed
		if ($this->isMainNavigationRoot($rootline, $rootNodeUid) === true){
			$GLOBALS['TSFE']->fe_user->setKey('ses', 'tx_unisbghookconsumer_breadcrumb', NULL);
			$sessionData = array();
		}
		
		$counter = 0;
		$breadcrumbs = array();
		foreach ($rootline as $page) {
			// do not show the root-node an the node for the "zentrale navigation" is specified
			if ($page['pid'] == '0' || $page['pid'] == $rootNodeUid){
				$counter++;
				continue;
			}
			
			$title = '';
			if (isset($page['_MOUNT_OL'])){
				// show content from mounted page has been chosen
				if ($page['_MOUNT_OL'] == '1'){
					// get the mount point referer
					$mp = split('-',$page['_MP_PARAM']);
					$mp = $mp[1];
					
					// get the mount point's title - if not standard language the $page['title'] might allready contain a valid name as it comes from the subnavilink
					if (!empty($page['_MOUNT_PAGE']) && $GLOBALS['TSFE']->sys_language_uid == 0) {
						$title = $page['_MOUNT_PAGE']['title'];
					}
				}
			}
			// if no mount point's title was found takte title of the current page
			if (empty($title)){
				$title = $page['title'];
			}
			
			// get link
			$mountPointRaw = '';
			if (!empty($page['_MP_PARAM'])){
				$mountPointRaw = $page['_MP_PARAM'];
			}
			
			// sometimes the MP param gets lost (if eg nested mountpoints are configured) get the MP out of the GET/POST params
			$mpParam = t3lib_div::_GP('MP');			
			$currentPageId = t3lib_div::_GP('id');
			if (!empty($mpParam) && empty($mountPointRaw)){
				// only append to the current page 
				if ($page['uid'] == $currentPageId){
					$mountPointRaw = $mpParam;
				}
			}
			
			// store data into session
			$linkData = array();
			$linkData['id'] = $page['uid'];
			$linkData['MP'] = $mountPointRaw;
			$linkData['title'] = $title;
			
			
			// somtetimes mountpoint data is getting lost use session to save it
			$idExists = false;
			for ($i = 0; $i < count($sessionData); $i++) {
				if (intval($sessionData[$i]['id']) === intval($linkData['id'])){
					// if at any point of time there is some additional mountpoint information save it in order to not get lost
					if (!empty($linkData['MP'])){
						if (count($linkData['MP']) > count($sessionData[$i]['MP'])){
							$sessionData[$i]['MP'] = $linkData['MP'];
						}
					}

					// overwrite title if it was substituted 
					if (empty($sessionData[$i]['isTitleSubstituted'])){
						$sessionData[$i]['title'] = $linkData['title'];
					}
					
					// overwrite title if it was substituted and the language has changed
					$hasChangedLanguage = false;
					if (isset($sessionData[$i]['L'])){
						if ($GLOBALS['TSFE']->sys_language_uid != $sessionData[$i]['L']){
							$hasChangedLanguage = true;
						}
					}
					
					if (!empty($sessionData[$i]['isTitleSubstituted']) && $hasChangedLanguage){
						$sessionData[$i]['title'] = $linkData['title'];
						unset($sessionData[$i]['isTitleSubstituted']);
					}
					
					$idExists = true;
					break;
				}
			}
			
			// append items which id does not exist allready in the session
			if ($idExists === false){
				$sessionData[] = $linkData;
			}

			// search for the link data in the session array in order to extract the whole link data needed
			// this information may be saved before so synchronize the rootline with the session array
			for ($i = 0; $i < count($sessionData); $i++) {
				if ($sessionData[$i]['id'] == $linkData['id']){
					$breadcrumbs[] = $sessionData[$i];
					break;
				}
			}
			$counter++;
		}

		// remove nested loops / entries
		$breadcrumbs = $this->removeLoops($breadcrumbs);

		// sync back the navigation to the session 		
		$sessionData = $breadcrumbs;
		// store session data 
		$GLOBALS['TSFE']->fe_user->setKey('ses', 'tx_unisbghookconsumer_breadcrumb', $sessionData);
		
		$content .= $this->renderBreadcrumbs($breadcrumbs, $tabindex, $accesskey);
		return $content;
	}
	
	/**
	 * Checks for nested loops and removes the first occurency, tries to overwrite mountpoint title when specified, also cuts the internal used
	 * rootline ($GLOBALS['TSFE']->tmpl->rootLine) in order not to interfear with the realurl extension
	 * @param	array	$breadcrumbs	Collection containing current navigation data stored in the session
	 */
	private function removeLoops($breadcrumbs){
		// search first occurency of current page, cut other pages allready saved in the session
		$indexFound = -1;
		for ($i = count($breadcrumbs)-1; $i > 0; $i--) {
			if ($breadcrumbs[$i]['id'] == $breadcrumbs[0]['id'] && $i < count($breadcrumbs)-1){
				$indexFound = $i;
				
				// check if language has changed
// 				$hasChangedLanguage = false;
// 				if (isset($breadcrumbs[$i]['L'])){
// 					if ($GLOBALS['TSFE']->sys_language_uid != $breadcrumbs[$i]['L']){
// 						$hasChangedLanguage = true;
// 					}
// 				}
				
				// overwrite title with title from mountpoint if not allready overwritten 
				if (empty($breadcrumbs[$i]['isTitleSubstituted']) || $hasChangedLanguage){
					$breadcrumbs[$i]['title'] = $breadcrumbs[0]['title'];
					$breadcrumbs[$i]['isTitleSubstituted'] = 1;
					$breadcrumbs[$i]['L'] = $GLOBALS['TSFE']->sys_language_uid;	// save language for later comparision
				}
				
				// the $GLOBALS['TSFE']->tmpl->rootLine seems to be the internal memory for all pages navigated in the rootline before
				// if we remove some page in order to avoid nested loops we also have to remove this entries from the $GLOBALS['TSFE']->tmpl->rootLine
				for ($j = 0; $j < count($GLOBALS['TSFE']->tmpl->rootLine); $j++) {
					// search for the first occurency in the array which is sorted like root->sublevels aso
					if ($GLOBALS['TSFE']->tmpl->rootLine[$j]['uid'] == $breadcrumbs[$i]['id']){
						// remove all items after the first occurency
						$GLOBALS['TSFE']->tmpl->rootLine = array_slice($GLOBALS['TSFE']->tmpl->rootLine, 0, $j+1);
						break;
					}
				}
				
				// The $GLOBALS['TSFE']->MP seems to hold the latest mountpoint data navigated yet. If there are nested mounpoints eg. 5350-19947,19941-20722
				// the mount-point pair at the end should be removed 
				if (!empty($GLOBALS['TSFE']->MP)){
					$mountpoints = split(',', $GLOBALS['TSFE']->MP);
					if (!empty($mountpoints)){
						$mountpoints = array_slice($mountpoints, 0, (count($mountpoints)-1));
						$GLOBALS['TSFE']->MP = join(',', $mountpoints);
					}
				}
				
				break;
			}
		}
		
		// copy element until the item search for into a new array, including the searched for item
		$newBreadcumbs = array();
		if ($indexFound > -1){
			for ($i = count($breadcrumbs)-1; $i >= $indexFound; $i--) {
				$newBreadcumbs[] = $breadcrumbs[$i];
			}
		}
		else { // if not found return the old array
			$newBreadcumbs = array_reverse($breadcrumbs);
		}
		
		return $newBreadcumbs;
	}
	
	/**
	 * 
	 * Extracts the main information out of the rootline in order to debug it later on.
	 * @param 	array	$rootline	Rootline of the current page.
	 * @return	string				String containing the debug information (human readable)
	 */
	private function debugRootline($rootline){
		$debugData = array();
		foreach ($rootline as $page) {
			$data = array();
			$data['uid'] = $page['uid'];
			$data['pid'] = $page['pid'];
			$data['title'] = $page['title'];
			$data['mount_pid'] = $page['mount_pid'];
			$data['mount_pid_ol'] = $page['mount_pid_ol'];
			$data['_MOUNT_OL'] = $page['_MOUNT_OL'];
			$data['_MOUNT_PAGE'] = $page['_MOUNT_PAGE'];
			$data['_MOUNTED_FROM'] = $page['_MOUNTED_FROM'];
			$data['_MP_PARAM'] = $page['_MP_PARAM'];
			$debugData[] = $data;
		}
		return print_r($debugData, true);
	}
	
	/**
	 * Removes the MP params from the specified string eg. &MP=123-456&test=123 -> &test=123
	 * @param 	string 	$linkVars	String to be replaced.
	 * @return 	string				Replaced string.
	 */
	private function removeMPparams($linkVars){
		$cleanedParams = $linkVars;
		$pos = stripos($linkVars, '&MP=');
		if ($pos !== false){
			$mpParams = substr($linkVars, $pos, strlen($linkVars)-$pos);
			// check if it is not the last param
			$end = stripos($mpParams, '&');
			if ($end != false){
				$mpParams = substr($mpParams, 0, $end);
			}
			$cleanedParams = str_ireplace($mpParams, '', $linkVars);
		}

		return $cleanedParams;
	}
	
	/**
	 * Renders the breadcrumb navigation HTML code.
	 * @param array 	$breadcrumbs	Collection containing the latest navigation data.
	 * @param integer	$tabindex		Integer value to specify the links tabindex.
	 * @param string	$accesskey		The link's accesskey which will be assigned to the first link.
	 * @return string					The HTML code <li> wrapped <a>-Tags
	 */
	private function renderBreadcrumbs($breadcrumbs, $tabindex, $accesskey) {
		$navigation = '';
		$counter = 0;

		foreach ($breadcrumbs as $breadcrumb) {
			// delete unwanted MP-data out of the $GLOBALS['TSFE']->linkVars representing the current URL
			$GLOBALS['TSFE']->linkVars = $this->removeMPparams($GLOBALS['TSFE']->linkVars);
 			$href = $GLOBALS['TSFE']->cObj->getTypoLink_URL($breadcrumb['id'], $breadcrumb['MP']);
 			//error_log('MP:'.$GLOBALS['TSFE']->MP.', linkvars: '.$GLOBALS['TSFE']->linkVars.', uid: '.$breadcrumb['id'].', href: '.$href."\n", 3, 'C:\xampp\apache\logs\error.log' );
			
			// extract & prepare data
			$id = $breadcrumb['id'];
			$mountpoint = $breadcrumb['MP'];
			if (!empty($mountpoint)){
				$mountpoint = '&MP='.$mountpoint;
			}
			$title = $breadcrumb['title'];
			
			// add access-key to first link
			if ($counter == 0){
				$navigation .= '<li><a href="'.$href.'" title="'.$title.'" id="access-'.$accesskey.'" accesskey="'.$accesskey.'" tabindex="'.$tabindex.'">'.$title.'</a></li>';				
			}
			elseif ($counter == count($breadcrumbs)-1){ // un-link the last element -> it is the current one
				 $navigation .= '<li><strong title="'.$title.'">'.$title.'</strong></li>';
			}
			else {
				$navigation .= '<li><a href="'.$href.'" title="'.$title.'" tabindex="'.$tabindex.'">'.$title.'</a></li>';
			}
			$counter++;
			$tabindex++;
		}
		
		return $navigation;
	}
}
?>
```

vielleicht hilft's ja jemandem...

---

Quelle: „den titel des mount points in navigation ausgeben...“, typo3.net, https://www.typo3.net/d/113498-den-titel-des-mount-points-in-navigation-ausgeben
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